[Haskell-cafe] -XGADTs changes type for program that does not contain GADT
andres at well-typed.com
Fri Feb 12 13:05:12 UTC 2016
> the following type-correct program does not contain GADT syntax.
> When I activate GADT language pragma, it does no longer typecheck.
This is because -XGADTs implies -XMonoLocalBinds. See
https://ghc.haskell.org/trac/ghc/blog/LetGeneralisationInGhc7 for a
Andres Löh, Haskell Consultant
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